25720750051 has 4 divisors (see below), whose sum is σ = 25851312432. Its totient is φ = 25590187672.

The previous prime is 25720750031. The next prime is 25720750061. The reversal of 25720750051 is 15005702752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25720750051 - 2¹¹ = 25720748003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25720749989 and 25720750016.

It is not an unprimeable number, because it can be changed into a prime (25720750001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65280895 + ... + 65281288.

It is an arithmetic number, because the mean of its divisors is an integer number (6462828108).

Almost surely, 2^25720750051 is an apocalyptic number.

25720750051 is a deficient number, since it is larger than the sum of its proper divisors (130562381).

25720750051 is a wasteful number, since it uses less digits than its factorization.

25720750051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130562380.

The product of its (nonzero) digits is 24500, while the sum is 34.

The spelling of 25720750051 in words is "twenty-five billion, seven hundred twenty million, seven hundred fifty thousand, fifty-one".